Size-dependent thermal conductivity of zinc oxide nanobelts

被引：70

作者：

Kulkarni, AJ ^{[1
]}

Zhou, M ^{[1
]}

机构：

[1] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 14期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2193794

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The thermal conductivity of [01 (1) over bar0]-oriented ZnO nanobelts 19-41 angstrom in size is characterized over the temperature range of 500- 1500 K using the Green-Kubo approach. Values obtained are one order of magnitude lower than that for bulk ZnO single crystal. Surface scattering of phonons and the high surface-to-volume ratios of the nanobelts are primarily responsible for the significantly lower values and the size dependence observed. The conductivity is also found to decrease with temperature and this decrease is attributed to thermal softening of the material, three- and four-phonon processes, and optical phonon interactions. (c) 2006 American Institute of Physics.

引用

页数：3

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